<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript">
			/*
			  + - * / % ** ++ --
			*/
			var a = 6;
			var b = 9;
			var c = a + b;
			console.log(c);

			var d = 0.1 + 0.2;
			console.log(d);

			//非0就是true,在运算时true代表1 false代表0
			var e = true;
			console.log(e + 1);

			console.log(2 ** 3);

			console.log(6 % 2);
		</script>
	</head>
	<body>
	</body>
</html>
